Definitions by Glitchgoat

Smoothbrain 

A way of calling somebody very stupid that requires them to be smart, in order to understand.

Person 1: Dude, why did you think that was possible? You're such a smoothbrain.
Person 2: ...huh? What the hell is that supposed to mean
Laughtrack: *laughs*

Smoothbrain by Glitchgoat September 5, 2019